package com.g4.shoppingback.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * 本类配置全局跨域开启
 */
@Configuration
public class MyWebConfigurer implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry corsRegistry) {
        /**
         * 所有请求都允许跨域，使用这种配置就不需要
         * 在interceptor中配置header了
         */
        corsRegistry.addMapping("/**")
                .allowCredentials(true)
                .allowedOrigins("*")
                .allowedMethods("*")
                .allowedHeaders("*")
                .maxAge(3600);
    }


    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*"); // 1
        corsConfiguration.addAllowedHeader("*"); // 2
        corsConfiguration.addAllowedMethod("*"); // 3
        corsConfiguration.setAllowCredentials(true); //4
        return corsConfiguration;
    }

    /**
     * 配置Security跨域请求
     * @return
     */
    @Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig()); // 5
        return new CorsFilter(source);
    }
}
